Coil-winding method and apparatus



2 July 6 1927 D. re. LovEJoY COIL WINDING METHOD AND APPARATUS 2 Sheets-Sheet 1 Filed sept. 25. i925 INVENTOR /mw rr Hass ans/0r 1,637121 Jul-yr 26 1.927 Y D. R. LovEJoY i 'Y COIL wINDING METHOD AND APPARATUS Filed Sept. 25, 1925 2 Sheets-Sheet 2 www 7 5 /4- Z5, I/' 10 F/ Patented July 26, 1927.

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sections, While, the sections lie `ity-parallel` bling form 23 may have for example a circumference seven-sixths of the circumfer` ence of the crimping form 9, so that it will require seven of the sections formed on the crimping form to encircle the assembling form. The object of this is to bring the sec; tions of greater radius lon one turn next to the sections of lesser radius on the adjacent turnspand thus yproduce the desired stagered effect. The frontof the assembling orrn 23 is inline with the front of the crimping form. The axes of the two forms are therefore offset as rshown by the dotted center lines in Figure l. The form 23 is comprised of a metallic tube split longitudinally as shown as 24 and mounted at each Vend on cone-faced plugsA 25 `and 26 which in turn are carried by a central arbor 27. A slight movement outward of the cone 25 allows the split tube 23to collapse suiciently to permit the easy removal of the coil from the form.' ,T he cone plug 25 has a peripheral flange 25` .the interior of lwhich has seven, or any other oddjnumber of notches 28, which causes the flange 25 to yact as an internal gear to thesix or any even number of :pins 11 which project from the crimping form. By this; means the relation of the lcircumferential,speeds of the crimpingform and the winding form are made such that an even number-of sections encircling the crimping. form will. by the relative, slower or relative faster movementof the winding form result man olf number of sections en .circling the latter. u

In operation a wire 14 is led over a guiding pulley 30 and Wound on the crimping form by the rotation ofthe arbor l: At a point beyond wherethe wire first contacts -with the form, the pins 8, pushed outward by the wedge 13, are thruthe action of the camlS and springs 20, brou ht down onto the wire at a point adjacent t A1e shoulder on the form between the inner and outer sec tions and is thus crimped or bent to conform to the shape of the form,the plate 22 insuringcthe pressing home of each pin in turn As shown 1n Figure 3 there are two form by any suitable means as for example a rubber band 32, and the successive turns are pushed together by the hand of the operator as each turn comes around until the desired number of turns have been wound, when the machine is stopped and the wire again secured by a rubber band or the like `at the outer end. Before releasing the coil flat strips 33 (see Figure 9) are inserted in the yspaces between the inner and outer sections to" hold the turnsv in place until cords 34 can be tied around the crossings. After the strips 33 are in place, the cone plug 25 is moved slightly outward andthe cylinder 23 will then collapse sutliciently to allow the` coil to be taken ofi' the form, the forni being removed .from the chuck 23 for this purpose or the chuck itself moved a sulicicnt distance to the right.

The crimping form may be polygonal'instead of circular andliigure 8 shows apartial view of such a form. In this case, the number of sides is also even and the equiva lent of the inner and' outer radii is attained by making alternate sides of the poly on longerthan the intermediate sidcs.` WV ien a wire is wound on such a forin'andtransferred to a polygonal winding form, having an odd number of sides, a coil'having the characteristic 'such as shown in Figure 10, will result.

While I have shown'a practicable method of winding inductance coils with staggered n sections, I do not wish to be limited to the my invention as set forthin the following" claims.

I claim Vl. The method of winding helical wire coils, comprising, winding and crimping thew wire in the form of a turn withan even number of sections per turn and then winding it in helical form, the perimeter of which is equal to an odd number of said sections.

2. The method of winding helical wire coils comprising winding the wire on a form having a perimeter divided into an even number of sectionswhose distances from the center are Valternately long and shortand thenpassembling said wire into a coil ,in which adjacent portions of successivev turns are at alternately long and lshort distances from thevcenter, said `wire passing from 011e distance to the other,` an odd number of times per turn.

3 Tl1emethod of winding helical wire coils comprising, winding the wire onto a crimping form having a perimeter divided into an even number of sections with alternate sections radially displaced, and then removing the wire from the said form and winding it on lan assembling form, the circumference of which is equal to an odd number of the said sections whereby the adjacent sections of adjacent turns, will be radially displaced.

4. The method of winding helical wire coils comprising, winding the wire onto a crimping form having a perimeter divided into an even number of -sections transferring the wire from the saidform andwinding ity on an assembling form, the circumference of which is equal to an odd number of said sections and rotating the first and second forms at aXial speeds inversely proportional to their circumferences whereby the adjacent sections of adjacent turns of the finished Coil will be radially displaced.

In apparatus for Winding Wire coils, the combination comprising, a rotatable shaping form, means associated with said form for crimping the Wire in sections with alternate sections displaced radially and an assembling form having a circumference equal to an odd number of said sections, said assembling form being geared to the said Y y shaping form so as to run at an axial speed inversely as the cireuinferences of the two said forms.

6. The method of Winding coils, Which comprises bending the Wire at intervals to define sections, and thereafter Winding the bent Wire into a helix, each lturn of which contains an odd number of sections and the successive sections of which are radially staggered.

DIMMITT ROSS LOVEJOY-` 

